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Terahertz holography for imaging amplitude and phase objects.
- Source :
-
Optics express [Opt Express] 2014 Jun 30; Vol. 22 (13), pp. 16079-86. - Publication Year :
- 2014
-
Abstract
- A non-monochromatic THz Quantum Cascade Laser and an uncooled micro-bolometer array detector with VGA resolution are used in a beam-splitter free holographic set-up to measure amplitude and phase objects in transmission. Phase maps of the diffraction pattern are retrieved using the Fourier transform carrier fringe method; while a Fresnel-Kirchhoff back propagation algorithm is used to reconstruct the complex object image. A lateral resolution of 280 µm and a relative phase sensitivity of about 0.5 rad are estimated from reconstructed images of a metallic Siemens star and a polypropylene test structure, respectively. Simulations corroborate the experimental results.
Details
- Language :
- English
- ISSN :
- 1094-4087
- Volume :
- 22
- Issue :
- 13
- Database :
- MEDLINE
- Journal :
- Optics express
- Publication Type :
- Academic Journal
- Accession number :
- 24977861
- Full Text :
- https://doi.org/10.1364/OE.22.016079